package utils;

public class HzPyUtil {
  // 国标码和区位码转换常量
  static final int GB_SP_DIFF = 160;
  // 存放国标一级汉字不同读音的起始区位码
  static final int[] secPosvalueList = {1601, 1637, 1833, 2078, 2274, 2302,
    2433, 2594, 2787, 3106, 3212, 3472, 3635, 3722, 3730, 3858, 4027,
    4086, 4390, 4558, 4684, 4925, 5249, 5600};
  // 存放国标一级汉字不同读音的起始区位码对应读音
  static final char[] firstLetter = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
    'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'w', 'x',
    'y', 'z'};

  // 获取一个字符串的拼音码
  public static String getFirstLetter(String oriStr) {
    String str = oriStr.toLowerCase();
    StringBuilder buffer = new StringBuilder();
    char ch;
    char[] temp;
    for (int i = 0; i < str.length(); i++) { // 依次处理str中每个字符
      ch = str.charAt(i);
      temp = new char[]{ch};
      byte[] uniCode = new String(temp).getBytes();
      if (uniCode[0] > 0) { // 非汉字
        buffer.append(temp);
      } else {
        buffer.append(convert(uniCode));
      }
    }
    return buffer.toString();
  }

  static char convert(byte[] bytes) {
    char result = '-';
    int secPosvalue = 0;
    int i;
    for (i = 0; i < bytes.length; i++) {
      bytes[i] -= GB_SP_DIFF;
    }
    secPosvalue = bytes[0] * 100 + bytes[1];
    for (i = 0; i < 23; i++) {
      if (secPosvalue >= secPosvalueList[i]
        && secPosvalue < secPosvalueList[i + 1]) {
        result = firstLetter[i];
        break;
      }
    }
    return result;
  }

  public static void main(String[] args) {
    System.out.println(HzPyUtil.getFirstLetter("中国人民解放军"));
  }
}
